body {
    margin                 : 0;
    padding                : 0;
    tab-size               : 4;
    font-family            : ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    font-feature-settings  : normal;
    font-variation-settings: normal;
}

*,
*:before,
*:after {
    box-sizing        : border-box;
    -webkit-box-sizing: border-box;
    -moz-box-sizing   : border-box;
}

code {
    font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New', monospace;
}